<template>
  <div class="shopCart">
    <div class="content" @click="toggleList">
      <div class="content-left">
        <div class="logo-wrapper">
          <div class="logo" :class="{'heightlight':totalCount>0}">
            <i class="icon-shopping_cart" :class="{'heightlight':totalCount>0}"></i>
          </div>
          <div class="num" v-show="totalCount>0">{{totalCount}}</div>
        </div>
        <div class="price" :class="{'heightlight':totalCount>0}">{{totalPrice}}元</div>
        <div class="desc">另需配送破费{{deliveryPrice}}元</div>
      </div>
      <div class="content-right">
        <div class="pay" :class="payClass" @click.stop.prevent="pay()">
          {{payDesc}}
        </div>
      </div>
    </div>
    <transition name='fade'>
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class="empty" @click="empty()">清空</span>
        </div>
        <div class="list-content" ref="listContent">
          <ul>
            <li class="food" v-for="(food,index) in selectFoods" :key="index">
              <span class="name">{{food.name}}</span>
              <div class="price">
                <span>{{food.price*food.count}}</span>
              </div>
              <div class="cartcontral-wrapper">
                <cartcontral :food='food'></cartcontral>
              </div>
            </li>
          </ul>
          </div>
        </div>
    </transition>
    <transition name="fade">
      <div class="list-mask" @click="hideList" v-show="listShow"></div>
    </transition>
    
  </div>
</template>

<script>
import BScroll from "better-scroll";
import cartcontral from "../cartcontral/cartcontral";

export default {
  props: {
    selectFoods: {
      type: Array,
      default() {
        return [
          // {
          //   price: 10,
          //   count: 2
          // }
        ];
      }
    },
    deliveryPrice: {
      type: Number,
      default: 0
    },
    minPrice: {
      type: Number,
      default: 0
    }
    // fold:{
    //   type:Boolean,
    //   default:true
    // },
  },
  data() {
    return {
      fold: true
    };
  },
  computed: {
    totalPrice() {
      let total = 0;
      this.selectFoods.forEach(food => {
        total += food.price * food.count;
      });
      return total;
    },
    totalCount() {
      let count = 0;
      this.selectFoods.forEach(food => {
        count += food.count;
      });
      return count;
    },
    payDesc() {
      if (this.totalPrice === 0) {
        return `${this.minPrice}元起送`;
      } else if (this.totalPrice < this.minPrice) {
        let diff = this.minPrice - this.totalPrice;
        return `还差${diff}元起送`;
      } else {
        return "去结算";
      }
    },
    payClass() {
      if (this.totalPrice < this.minPrice) {
        return "not-enough";
      } else {
        return "enough";
      }
    },
    listShow() {
      if (!this.totalCount) {
        this.fold = true;
        return false;
      }
      let show = !this.fold;
      if (show) {
        this.$nextTick(() => {
          if (!this.scroll) {
            this.scroll = new BScroll(this.$refs.listContent, {
              click: true
            });
          }
        });
      } else {
        // this.scroll.refresh();
      }

      return show;
    }
  },
  methods: {
    toggleList() {
      console.log(123);
      if (!this.totalCount) {
        return;
      }
      this.fold = !this.fold;
    },
    empty() {
      this.selectFoods.forEach(food => {
        food.count = 0;
      });
    },
    hideList(){
      this.fold =  true
    },
    pay(){
      if(this.totalPrice<this.minPrice){
        return
      }
      window.alert('支付')
    }
  },
  components: {
    cartcontral
  }
};
</script>

<style lang="stylus" scoped>
@import './../../common/stylus/mixin.styl';

.shopCart {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 50;
  width: 100%;
  height: 48px;
  // background #000
  .content {
    display: flex;
    background-color: #141d27;
    font-size: 0;

    .content-left {
      flex: 1;

      .logo-wrapper {
        display: inline-block;
        position: relative;
        top: -10px;
        margin: 0 12px;
        padding: 6px;
        width: 56px;
        height: 56px;
        box-sizing: border-box;
        vertical-align: top;
        border-radius: 50%;
        background-color: #141d27;

        .logo {
          width: 100%;
          height: 100%;
          border-radius: 50%;
          text-align: center;
          background-color: #2b343c;

          &.heightlight {
            background-color: rgb(0, 160, 220);
          }

          .icon-shopping_cart {
            line-height: 44px; // 与父元素的高度相同 居中
            height: 24px;
            color: #80858a;

            &.heightlight {
              color: #ffffff;
            }
          }
        }

        .num {
          position: absolute;
          top: 0px;
          right: 0px;
          width: 24px;
          height: 16px;
          line-height: 16px;
          text-align: center;
          border-radius: 16px;
          font-size: 9px;
          font-weight: 700;
          color: #ffffff;
          background-color: rgb(240, 20, 20);
          box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4);
        }
      }

      .price {
        display: inline-block;
        vertical-align: top;
        margin-top: 12px;
        line-height: 24px;
        padding-right: 12px;
        box-sizing: border-box;
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        font-size: 16px;
        font-weight: 700;
        color: rgba(255, 255, 255, 0.4);

        &.heightlight {
          color: #fff;
        }
      }

      .desc {
        display: inline-block;
        vertical-align: top;
        margin: 12px 0 0 12px;
        line-height: 24px;
        color: rgba(255, 255, 255, 0.4);
        font-size: 10px;
      }
    }

    .content-right {
      flex: 0 0 105px;
      width: 105px;

      .pay {
        height: 48px;
        line-height: 48px;
        text-align: center;
        font-size: 12px;
        color: rgba(255, 255, 255, 0.4);
        font-weight: 700;
        background-color: #2b333b;

        &.not-enough {
          background-color: #2b333b;
        }

        &.enough {
          background-color: #00b43c;
          color: #fff;
        }
      }
    }
  }

  .shopcart-list {
    position: absolute;
    top: 0;
    left: 0;
    transform: translate3d(0, -100%, 0); // 技巧布局偏移自身100%
    z-index: -1;
    width: 100%;
    .list-header {
      height: 40px;
      line-height: 40px;
      padding: 0 18px;
      background-color: #f3f5f7;
      border-bottom: 1px solid rgba(7, 17, 27, 0.1);

      .title {
        float: left;
        font-size: 14px;
        color: rgb(7, 17, 27);
      }

      .empty {
        float: right;
        font-size: 12px;
        color: rgb(0, 160, 220);
      }
    }

    .list-content {
      padding: 0 18px;
      max-height: 217px;
      overflow: hidden;
      background-color: #fff;

      .food {
        position: relative;
        padding: 12px 0;
        box-sizing: border-box;
        border-1px(rgba(7, 17, 27, 0.1));

        .name {
          line-height: 24px;
          font-size: 14px;
          color: rgb(7, 17, 27);
        }

        .price {
          position: absolute;
          right: 90px;
          bottom: 12px;
          line-height: 24px;
          font-size: 14px;
          font-weight: 700;
          color: rgb(240, 20, 20);
        }

        .cartcontral-wrapper {
          position: absolute;
          right: 0;
          bottom: 6px;
        }
      }
    }
  }
  .list-mask{
    position fixed 
    top 0 
    left 0 
    width 100%
    height 100%
    z-index -2
    -webkit-backdrop-filter :blur(10px)
    background-color rgba(7,17,27,0.6)
  }

  .fade-enter-active, .fade-leave-active {
    transition: all  0.5s;   
  }
  .fade-enter, .fade-leave-to { /* .fade-leave-active below version 2.1.8 */
    opacity: 0;
    transform translate3d(0,0,0)
  }
}
</style>


